Heh, TIL my opinion of missiles is the opposite of everyone else's. I never use missiles on any of my ships because I feel that vents and sustainability are more important than the burst damage missiles provide. My designs are very specialized to maximize the effectiveness of my energy weapons, needlers, and shields, and as a result, the longevity of my ships in combat. My fleet has 6 ships and it can take on anything and everything.
The theory behind my fleet is that it's better to focus on doing one thing really, really well than focus on several things and be less than stellar at all of them. The thing I focus on is flux stability (and flux efficiency, which is very related). Missiles, while they use no flux, use OP which I'd rather use on vents.